Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quais são as datas em que o oponente foi guillermo garcía-lópez albert portas?
 ###Tabelas: CREATE TABLE doubles:_10_5-5 (doubles:_10_5-5_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents VARCHAR, Score VARCHAR) CREATE TABLE recording_career (recording_career_id AUTO_INCREMENT PRIMARY KEY, Event VARCHAR, Year INT, Category VARCHAR, Work VARCHAR, Outcome VARCHAR) CREATE TABLE top_40_albums_of_2004 (top_40_albums_of_2004_id AUTO_INCREMENT PRIMARY KEY, Position INT, Album Title VARCHAR, Artist VARCHAR, Highest Position INT, Sales INT) CREATE TABLE members (members_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Date VARCHAR, Goals INT, Assists INT, Team VARCHAR, Venue VARCHAR, Opponent VARCHAR, Competition VARCHAR, Total Goals INT, Total Assists INT) CREATE TABLE analytical_table (analytical_table_id AUTO_INCREMENT PRIMARY KEY, State VARCHAR, Votes INT, Votes since 1856 INT, Democratic votes INT, D votes since 1856 INT, % of D votes VARCHAR, D % since 1856 VARCHAR, Republican votes INT, % of R votes VARCHAR, R % since 1856 VARCHAR, Other votes INT, O votes since 1856 INT, % of O votes VARCHAR, O % since 1856 VARCHAR)  
SELECT Date FROM doubles:_10_5-5 WHERE Opponents = guillermo garcía-lópez albert portas